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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 7: 15/34 + 7/21 + 19/34 +1 5/7 + 2/3 2/7 x 5/12 – 3 1/2 x 2/7

Home/ Toán Lớp 7: 15/34 + 7/21 + 19/34 +1 5/7 + 2/3 2/7 x 5/12 – 3 1/2 x 2/7

Toán Lớp 7: 15/34 + 7/21 + 19/34 +1 5/7 + 2/3 2/7 x 5/12 – 3 1/2 x 2/7

Tháng Tám 20, 2022 Toán học 2 Comments 0 views

Toán Lớp 7: 15/34 + 7/21 + 19/34 +1 5/7 + 2/3
2/7 x 5/12 – 3 1/2 x 2/7

Comments ( 2 )

  1. myngocla
    myngocla
    20 Tháng Tám, 2022 at 7:22 sáng
    Reply
    Học tút 

    toan-lop-7-15-34-7-21-19-34-1-5-7-2-3-2-7-5-12-3-1-2-2-7

  2. hoaiphuong85
    hoaiphuong85
    20 Tháng Tám, 2022 at 7:21 sáng
    Reply
    $\dfrac{15}{34}+\dfrac{7}{21}+\dfrac{19}{34}+1\dfrac{5}{7}+\dfrac{2}{3}$ 
    $=\dfrac{15}{34}+\dfrac{19}{34}+\dfrac{7}{21}+\dfrac{36}{21}+\dfrac{14}{21}$ 
    $=\dfrac{34}{34}+\dfrac{57}{21}$
    $=\dfrac{26}{7}$
                                                                                       
    $\dfrac{2}{7}.\dfrac{5}{12}-3\dfrac{1}{2}.\dfrac{2}{7}$ 
    $=\dfrac{2}{7}.\dfrac{5}{12}-\dfrac{7}{2}.\dfrac{2}{7}$ 
    $=\dfrac{2}{7}.(\dfrac{5}{12}-\dfrac{7}{2})$
    $=\dfrac{2}{7}.(-\dfrac{37}{12})$
    $=-\dfrac{37}{42}$

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222-9+11+12:2*14+14 = ? ( )

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